Electric battery.



L. R. RHOADES.

ELECTRIC BATTERY.

APPLICATION FILED DEC. [8, 1915.

- Apt-(25:.

WITNFSS INI'ENTOR, LL UYD 5-1. HHUADES a V B Y A TTORNE Y tainer which y be placed the usual absorbent 7 of bibulous.

The bottom 8 of the zinc Y can is separated fromthe mix by onefor more UNITED STATES, j PATENT OFFICE.

LLOYD R. BHOADES, OF FREMONT, OHIO, ASSIGNOR; TONATIONAL CARBON COMPAN Y, A CORPORATION OF NEW JERSEY.

ELECTRIC BATTERY.

Specification of Letters Patent.

Patented Nov. 21, 1916.

To all whom it may concern:

Be it known that I, LLOYD R. RHOADES, a citizen of the United States, residing atFremont, in the county of Sandusky and State of Ohio, have invented a certain new and useful Improvement in Electric Batteries, of which the following is a-full, clear, and exact description. I

My invention relates to electric batteries and is especially applicable-to the type commonly called dry cells.

It has been the almost. universal practice to place the dry which acts both as the positive electrode and the container. To prevent short circuits the zinc can of the completed dry cell has been placed in a loose fitting cardboard jacket on which is printed the name of the manufacturer and other information.

Heretofore more or less difficulty has been experienced in constructing the dry cells so that the zinc would not corrode through in certain parts before the cell was exhausted.

through loss of water by evaporation, but also moistened the jackets and caused short circuits when a plurality of cells have been connected together.

y invention aims to overcome these difficulties by producing a waterproof conwill permit the use. of thinner zines and eliminate the disadvantageshere tofore experienced with leaky cans. The manner in which this is-accomplished is described the appended specification with reference to thedrawing in which the single. figure is a cross sectional view cell embodying the invention.

Referring to the drawing, the zinc' can 1- contains battery mix 2 from which it may be separated by an appropriate bibulous lining 3. A carbon electrode 4 islocated in the mix and has the usual binding post-5 attached to the end protruding through the seal 6. Between the seal 6 and the mix may ofadry paper, sand, etc.

layers 9 of paper or pitch or both. I

Either after or before placing the dry cell contents in the zinc, thelatter is wrapped with a thin layer 10 of ped in pitch or tarry material, or proed with a layer of some other suitable cell contents in a zinc can waterproof paper, or

.coatmg of a suitable paste or other adhesive which will hold the-jacket together. When the cardboard dries out it shrinks and binds the waterproof paper or other suitable material tightly against the'zinc: The cell is then ready for shipment. Cells constructed in this way'have proven to be I have used the improved form of jacket on dry cells with only substantially enough zinc to theoretically produce the desired electricenergy, and when these cells have been exhausted in service it has been found that the entire zinc can was consumed 1 throughout its entire surface, and yet no electrolyte was able to reach the cell jacket. TlllS not onlv depleted the cell of electrolyte The invention can be used with zinc cans of any thickness,

especially valuable in thin zines, which reduces considerably the cost of manufacture without in any wayv loweringthe quality of the cells. Of course it is not essential that the waterproof material be added to the zinc, as it can be attached or applied to the jacket. In shrinklng, the

jacket would bind the waterproof material against the zinc as previously descrlbed. In materials may be used place of paper other for the jacket, provided theyhave the property ofshrinkingupon drying out.

Having described claim is z- 1. In .electric batteries, a zlnc electrode my invention, what I containing an electrolyte, a layer of water proof material and a jacket shrimk around said waterproof material to bind tightly against the zinc.

2. electric batteries, a zinc electrode containing an electrolyte, a sheet of.waterproof paper around the zinc electr'ode and 'a cardboard jacketshrunk on said sheet of paper.

as it Waterproofs the same regardless of the gage of zinc used; but since it prevents the electrolyte from leaking. it is making dry cells with very strong mechanically and quite waterproof. In fact, 

